# 转义字符
print('let\'s learn Python')

for i in range(0, 101, 2):
    print("=======开始下载=======")
    if i == 100:
        print("=======下载完成=======")
        break
    else:
        print(f'{i}%[', "*" * (i // 2), "." * (50 - i // 2), ']')

str1 = "6666666"
symble = "*"
print(symble.join(str1))